<Jeremy's IT Lab> Day19: DPT, VTP

DPT, VTP

(removed scope from CCNA test)

 

DTP:

-> Cisco proprietary protocol allows Cisco switches to dynamically determine their interface status(access/ trunk) without manual configuration

-> enabled by default on all Cisco switch interfaces

-> manual config is recommand (security)

-> dynamic desirable mode actively try to form a trunk with other Cisco switches. form a trunk if connected to another switchport

 

'static access' means an access port that belongs to a single VLAN doesn't change

'dynamic access', a server automatically assigns VLAN depending on MAC address of the connected device

 

Administrative Mode	Trunk	Dynamic Desirable	Access	Dynamic Auto
Trunk	Trunk	Trunk	X	Trunk
Dynamic Desirable	Trunk	Trunk	Access	Trunk
Access	X	Access	Access	Access
Dynamic Auto	Trunk	Trunk	Access	Access

 

VTP:

-> config VLANs on centered VTP server switch, other switch can synchronize VLAN db to server

-> Large scale

-> Version 1, 2(Token Ring), 3 (store vlan db)

-> mode : server / client / transparent

 

server: 

 - Store VLAN db in non-volatile RAM (NVRAM)

- Revision number counting when [add/ del/ mod]

- Can sync with other VTP servers like as client

client:

- not  [add/ del/ mod]

- not store db (except V3)

- foward VTP to other VTP client 

- receive VTP advertisment with VTP domain name, and join VTP domain

transparent:

- Not participate VTP domain

- Maintain own TTP db in NVRAM

- Not advertise db, but advertise the same domain

 

* 2 methods of reset revision number

1: Change VTP domain name unused

2: Change VTP domain mode to transparent

 

//CLI

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Acronyms:

• DTP : Dynamic Trunking Protocol
• VTP : VLAN Trunking Protocol